Portable power bank



FIG. 1 is a prospective view of a portable power bank showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a right view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof;

FIG. 8 is a perspective view thereof in which the portable power bank isconnected with a portable electronic device;

FIG. 9 is a perspective view thereof in which the portable power bank isconnected with a storage device; and,

FIG. 10 is a perspective view thereof in which the portable power bankis connected with a Ethernet cable.

The broken lines of FIGS. 8, 9 and 10 are included for the purpose ofillustrating the environment of the claimed design and form no partthereof.

CLAIM The ornamental design for a portable power bank, as shown anddescribed.